<%--
  Created by IntelliJ IDEA.
  User: Aiden
  Date: 2019/4/16
  Time: 19:42
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
    <%--<% HttpSession httpSession = request.getSession();--%>
        <%--if (httpSession.getAttribute("username") == null) {--%>
    <%--%>--%>
    <input type="button" style="height:100px;width:100px;font-size:20px" value="登陆" onclick="window.location='https://cas.dgut.edu.cn?appid=javaee&state=STATE'">
    </input>

</head>
<body>

</body>
</html>
